Sophos Expansion Module - For Data Networking, Optical Network 4 RJ-45 10/100/1000Base-TX Network - Optical Fiber, Twisted PairGigabit Ethernet - 1000Base-X, 10/100/1000Base-TX - 1 Gbit/s - 4 x Expansion Slots - SFP (mini-GBIC)
4PORT GBE SFP + 4PORT GBE